A prehistoric sloth hunt is frozen in time in footprints preserved in the New Mexico desert, according to new research. It’s an extremely rare find that authors say could revolutionize our understanding of how ancient humans interacted with large animals. …

U.S. comedian Bill Cosby was convicted Thursday of drugging and molesting a one-time friend in 2004, which could send him to prison for the rest of his life. The 80-year-old Cosby now faces up to 10 years in prison for …

International scientists have identified 44 genetic variants that can increase the risk of developing major depression and found that all humans carry at least some of them. The new findings could help explain why not everyone treated with antidepressants sees …